무기질 충진재와 폴리우레탄을 활용한 유·무기 복합 단열소재의 발포조건에 따른 특성 평가

Abstract

In this work, the properties of an organic-inorganic hybrid insulating material using an inorganic filler and polyurethane foam with different foaming conditions were investigated. At weight ratios of polyol and isocyanate of 1 to 1.2 good foaming properties were noted. In addition, an addition of 0.4 g of water, 0.1 g of surfactant, and 0.1 g of catalyst with respect to the composites of polyol at 5 g and isocyanate at 6 g showed the lowest apparent density and thermal conductivity. The pore size was smaller in the organic -inorganic hybrid foaming body with an increase in the CaCO₃addition amount. Moreover, the apparent density and thermal conductivity were increased when the added amount of CaCO₃ increased. Increasing the amount of CaCO₃powder is expected to improve the flame retardant capabilities; however, doing this tends to increase the apparent density and thermal conductivity.